Rewrite ExtensionApiTest.SandboxedPages to catch exceptions.

chrome/test/data/extensions/api_test/sandboxed_pages/main.js

Index: chrome/test/data/extensions/api_test/sandboxed_pages/main.js
diff --git a/chrome/test/data/extensions/api_test/sandboxed_pages/main.js b/chrome/test/data/extensions/api_test/sandboxed_pages/main.js
index a313b114f9f89daf6bcc68ae6b141a370d21a289..441eb6b7856f60c9f0606e665394c24721d5771a 100644
--- a/chrome/test/data/extensions/api_test/sandboxed_pages/main.js
+++ b/chrome/test/data/extensions/api_test/sandboxed_pages/main.js
@@ -10,7 +10,11 @@ onmessage = function(event) {
   chrome.test.assertEq(undefined, event.data);
 
   // And we can't read theirs.
-  chrome.test.assertEq(undefined, sandboxedWindow.secret);
+  sandboxedWindowSecret = undefined;
+  try {
+    sandboxedWindowSecret = sandboxedWindow.secret;
+  } catch (e) {}
+  chrome.test.assertEq(undefined, sandboxedWindowSecret);
 
   chrome.test.succeed();
 };